155641131 has 6 divisors (see below), whose sum is σ = 224814980. Its totient is φ = 103760748.

The previous prime is 155641127. The next prime is 155641133. The reversal of 155641131 is 131146551.

155641131 is a `hidden beast` number, since 1 + 5 + 5 + 641 + 13 + 1 = 666.

155641131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155641131 - 2² = 155641127 is a prime.

It is a super-2 number, since 2×155641131² = 48448323317918322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155641095 and 155641104.

It is not an unprimeable number, because it can be changed into a prime (155641133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8646721 + ... + 8646738.

Almost surely, 2^155641131 is an apocalyptic number.

155641131 is a deficient number, since it is larger than the sum of its proper divisors (69173849).

155641131 is a wasteful number, since it uses less digits than its factorization.

155641131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17293465 (or 17293462 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 155641131 is about 12475.6214674861. The cubic root of 155641131 is about 537.9081519338.

Adding to 155641131 its reverse (131146551), we get a palindrome (286787682).

The spelling of 155641131 in words is "one hundred fifty-five million, six hundred forty-one thousand, one hundred thirty-one".